Markus Baier

Markus Baier
University of Padova | UNIPD · Department of Management and Engineering

Master of Science

About

10
Publications
3,108
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20
Citations

Publications

Publications (10)
Article
Micro- and nano-focus X-ray sources are extensively used in X-ray computed tomography systems to achieve high spatial resolution. This is essential, when scanning small objects, where resolution limitations are mainly connected to the size of the focal spot. Therefore, much effort has been put into reducing the size of the focal spot, where the mea...
Conference Paper
Full-text available
Laser Powder Bed Fusion (L-PBF) is a Metal Additive Manufacturing (MAM) technology where a complex 3D metal part is built from powder layers, which are selectively consolidated using a laser heat source. The processing zone is in the order of a few tenths of micrometer, making L-PBF a multi-scale manufacturing process. The formation and growth of g...
Article
Channels and bores in metal components produced by laser powder bed fusion (LPBF) are internal features that are typically affected by defects such as dross and sag formation, dimensional errors and global deformations in different proportions. Such deviations from the ideal geometry may strongly limit the functionality of the channels, but are dif...
Article
Full-text available
Channels with small diameters, used for example in conformal cooling, can nowadays be fabricated by laser powder bed fusion. Measurements of the mean effective diameter and surface topography are important to quantify the flow capabilities through the channel. In this paper, a new method using X-ray computed tomography is developed to obtain the me...
Conference Paper
Additive metal manufacturing processes, such as laser powder bed fusion, still show difficulties when producing overhang features or internal structures such as channels or bores. Channels are often mutilated by sag defects and dross formation at their upper part, when the channel-axis is close to parallel to the base plate and in the particular ca...
Conference Paper
Full-text available
PAM^2, which stands for Precision Additive Metal Manufacturing, is a European MSCA project in which 10 beneficiaries and 2 partners collaborate on improving the precision of metal Additive Manufacturing. Within this project, research is done for each process stage of AM, going from the design stage to modelling, fabricating, measuring and assessmen...
Conference Paper
Full-text available
Up to date, several different approaches are proposed in standards and guidelines to determine the spatial resolution and the focal spot size of micro X-ray sources. From a metrological point of view, the precise measurement of the focal spot is essential, as this is one of the main factors determining the uncertainty of computed tomography dimensi...
Conference Paper
Full-text available
State-of-the-art micro-focus X-ray sources are extensively used in industrial computed tomography systems to achieve micrometric resolution, which is fundamental when measuring for example micro-components or parts characterized by micro-features and structures. Resolution limitations are mainly connected to the size of the interaction cross-sectio...

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